From: "Michael S. Tsirkin" <mst@redhat.com>
To: Kees Cook <keescook@chromium.org>
Cc: lenaic@lhuard.fr, Michal Hocko <mhocko@suse.com>,
bijan.mottahedeh@oracle.com, KVM <kvm@vger.kernel.org>,
Network Development <netdev@vger.kernel.org>,
liang.z.li@intel.com, LKML <linux-kernel@vger.kernel.org>,
virtualization@lists.linux-foundation.org,
Stefan Hajnoczi <stefanha@redhat.com>,
Joe Perches <joe@perches.com>,
Andrew Morton <akpm@linux-foundation.org>,
Michal Hocko <mhocko@kernel.org>,
Linus Torvalds <torvalds@linux-foundation.org>
Subject: Re: [PULL] vhost: cleanups and fixes
Date: Thu, 1 Nov 2018 19:38:12 -0400 [thread overview]
Message-ID: <20181101193516-mutt-send-email-mst@kernel.org> (raw)
In-Reply-To: <CAGXu5jJ0HgV2qN=wohEgro6ixqXHOHBTsvS5a9Dcpz8gxVo3bA@mail.gmail.com>
On Thu, Nov 01, 2018 at 04:00:23PM -0700, Kees Cook wrote:
> On Thu, Nov 1, 2018 at 2:19 PM, Michael S. Tsirkin <mst@redhat.com> wrote:
> > The following changes since commit 84df9525b0c27f3ebc2ebb1864fa62a97fdedb7d:
> >
> > Linux 4.19 (2018-10-22 07:37:37 +0100)
> >
> > are available in the Git repository at:
> >
> > git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git tags/for_linus
> >
> > for you to fetch changes up to 79f800b2e76923cd8ce0aa659cb5c019d9643bc9:
> >
> > MAINTAINERS: remove reference to bogus vsock file (2018-10-24 21:16:14 -0400)
> >
> > ----------------------------------------------------------------
> > virtio, vhost: fixes, tweaks
> >
> > virtio balloon page hinting support
> > vhost scsi control queue
> >
> > misc fixes.
> >
> > Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
> >
> > ----------------------------------------------------------------
> > Bijan Mottahedeh (3):
> > vhost/scsi: Respond to control queue operations
>
> +static void
> +vhost_scsi_send_tmf_resp(struct vhost_scsi *vs,
> + struct vhost_virtqueue *vq,
> + int head, unsigned int out)
> +{
> + struct virtio_scsi_ctrl_tmf_resp __user *resp;
> + struct virtio_scsi_ctrl_tmf_resp rsp;
> + int ret;
> +
> + pr_debug("%s\n", __func__);
> + memset(&rsp, 0, sizeof(rsp));
> + rsp.response = VIRTIO_SCSI_S_FUNCTION_REJECTED;
> + resp = vq->iov[out].iov_base;
> + ret = __copy_to_user(resp, &rsp, sizeof(rsp));
>
> Is it actually safe to trust that iov_base has passed an earlier
> access_ok() check here? Why not just use copy_to_user() instead?
>
> -Kees
I am not sure copy_to_user will do the right thing here, because all
this runs in context of a kernel thread. We do need access_ok which
takes place way earlier in context of the task.
Another reason it is safe is because the address is not
coming from userspace at all.
> > vhost/scsi: Extract common handling code from control queue handler
> > vhost/scsi: Use common handling code in request queue handler
> >
> > Greg Edwards (1):
> > vhost/scsi: truncate T10 PI iov_iter to prot_bytes
> >
> > Lénaïc Huard (1):
> > kvm_config: add CONFIG_VIRTIO_MENU
> >
> > Stefan Hajnoczi (1):
> > MAINTAINERS: remove reference to bogus vsock file
> >
> > Wei Wang (3):
> > virtio-balloon: VIRTIO_BALLOON_F_FREE_PAGE_HINT
> > mm/page_poison: expose page_poisoning_enabled to kernel modules
> > virtio-balloon: VIRTIO_BALLOON_F_PAGE_POISON
> >
> > MAINTAINERS | 1 -
> > drivers/vhost/scsi.c | 426 ++++++++++++++++++++++++++++--------
> > drivers/virtio/virtio_balloon.c | 380 +++++++++++++++++++++++++++++---
> > include/uapi/linux/virtio_balloon.h | 8 +
> > kernel/configs/kvm_guest.config | 1 +
> > mm/page_poison.c | 6 +
> > 6 files changed, 688 insertions(+), 134 deletions(-)
>
>
>
> --
> Kees Cook
next prev parent reply other threads:[~2018-11-01 23:38 UTC|newest]
Thread overview: 65+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-01 21:19 [PULL] vhost: cleanups and fixes Michael S. Tsirkin
2018-11-01 21:44 ` Linus Torvalds
2018-11-01 23:00 ` Kees Cook
2018-11-01 23:06 ` Linus Torvalds
2018-11-01 23:55 ` Michael S. Tsirkin
2018-11-02 11:46 ` Mark Rutland
2018-11-02 13:04 ` Michael S. Tsirkin
2018-11-02 16:14 ` Linus Torvalds
2018-11-02 16:59 ` Michael S. Tsirkin
2018-11-02 17:10 ` Linus Torvalds
2018-11-02 17:15 ` Linus Torvalds
2018-11-02 19:01 ` Al Viro
2018-11-02 17:21 ` Michael S. Tsirkin
2018-11-02 18:02 ` Linus Torvalds
2018-11-02 18:12 ` Michael S. Tsirkin
2018-11-30 13:44 ` Michael S. Tsirkin
2018-11-30 19:01 ` Bijan Mottahedeh
2018-11-30 19:55 ` Michael S. Tsirkin
2018-11-01 23:38 ` Michael S. Tsirkin [this message]
[not found] <20200210010252-mutt-send-email-mst@kernel.org>
2020-02-11 2:07 ` Linus Torvalds
-- strict thread matches above, loose matches on Subject: below --
2019-10-15 21:19 Michael S. Tsirkin
2019-10-15 22:25 ` pr-tracker-bot
2019-05-14 21:11 Michael S. Tsirkin
2019-05-14 21:20 ` pr-tracker-bot
2018-06-11 16:23 Michael S. Tsirkin
2018-06-11 18:32 ` Linus Torvalds
2018-06-11 18:44 ` Linus Torvalds
2018-06-12 1:36 ` Michael S. Tsirkin
2018-06-12 1:59 ` Linus Torvalds
2018-06-12 11:05 ` Wei Wang
2018-06-14 15:01 ` Nitesh Narayan Lal
2018-06-15 3:53 ` Wei Wang
2018-06-12 1:57 ` Michael S. Tsirkin
2017-12-08 15:47 Michael S. Tsirkin
2017-12-04 13:25 Michael S. Tsirkin
2017-08-25 18:47 Michael S. Tsirkin
2017-04-10 21:36 Michael S. Tsirkin
2017-03-02 5:49 Michael S. Tsirkin
2017-02-03 21:43 Michael S. Tsirkin
2017-01-23 15:05 Michael S. Tsirkin
2017-01-23 21:50 ` Linus Torvalds
2017-01-24 2:45 ` Michael S. Tsirkin
2016-05-24 11:57 Michael S. Tsirkin
2015-12-21 7:58 Michael S. Tsirkin
2015-12-07 17:07 Michael S. Tsirkin
2015-09-18 10:42 Michael S. Tsirkin
2015-09-09 9:15 Michael S. Tsirkin
2015-07-28 10:00 Michael S. Tsirkin
2015-07-15 10:50 Michael S. Tsirkin
2015-07-15 11:26 ` Michael S. Tsirkin
2015-06-01 19:18 Michael S. Tsirkin
2015-06-01 19:45 ` Michael S. Tsirkin
2015-01-08 7:51 Michael S. Tsirkin
2015-01-01 12:26 Michael S. Tsirkin
2014-12-18 10:46 Michael S. Tsirkin
2014-11-13 21:22 Michael S. Tsirkin
2014-06-25 11:05 Michael S. Tsirkin
2013-07-15 18:31 Michael S. Tsirkin
2013-07-22 8:07 ` Michael S. Tsirkin
2013-07-08 11:45 Michael S. Tsirkin
2013-05-02 10:53 Michael S. Tsirkin
2013-05-02 18:55 ` Nicholas A. Bellinger
2013-05-02 19:33 ` Michael S. Tsirkin
2013-05-02 19:49 ` Linus Torvalds
2013-06-05 15:53 ` Michael S. Tsirkin
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